Pattern control and shedding mechanism for looms



Nov, 23, 1937. E FLOYD ET AL 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS l0 Sheets-Sheet 1 Filed Sept. 10, 1934 7w 54L 520 \1 7" 589 305 0g 206 i210 6| 590 i -0 2/0 @051 A --20 38 5420) .5 593 592 59 an 5! 509 50a 507 {I} a 5?,

24" 5 6? [5 SZ- g EUGENEQP. FLOYD ND He .H N 56 5) THUE Ca eo: EY'

NOV. 23, 1937. P, FLQYD ET AL 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 10 Shets-Sheet 2 m0, art 0W5 EUGENE F? FLOYD mm .q/z-ruue G-HQCKNEY Nov. 23, 1937. E P, FLOYD ET A "2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 7 1O Sheets-Sheet 3 WIIIII EUGENE/"57 FLOYD Nov. 23, 1937. EJP. FLOYD ET AL 7 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS I Filed Sept. 10, 1934 10 Sheets-Sheet 4 EUGENE P FLOYD RND 927/402. 6. H CKNEV man r044.

Nov. 23, 1937. E, R F D ET AL 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept; 10, 1934 10 Sheets-Sheet 5 EUGENEAEDFLOYD HBTHUR G. HACKNEY gwuc/Mow.

Nov. 23, 1937. E. P. FLOYD ET AL 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 I 10 Sheets-Sheet 6 .Z 17. 5 Eugen/5 5 FLOYD flemue G. Hacmvsy Nov. 23, 1937. R YD ET A 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 10 Sheets-Sheet 7 425 4% .555 355 M4 547 g 5% 4 545 m i a 515 I a 558 WWW 3 wu cm:

Euesrvs P FLOYD Y mm HR'i'HUQ G, HACKNEY GUM;

Nov. 23, 1937. l E.,-P. FLOYD ET AL PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 10 Shets-SheGt 8 I d? i i P a lam/s P FLOY'D HND Flew-we G. Hncu/EY Nov. 23, 1937. E. P. FLOYD ET AL 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOQMS Filed Sept. 10, 1954 10 Sheets-Sheet 9 EUGENE P FLOYD 4 o Germ/z 6. Hece/vsv 3114101443016 3% MZL Nov. 23, 1937. E. P. FLOYD ET AL. 2,099,729

PATTERN CONTROL AND SHEDDING MECHANISM FOR LOOMS Filed Sept. 10, 1934 10 Sheets-Sheet 10 EUGENE P FLOYD HND w. MQJW tervals.

Patented Nov. 23, 1937 UNITED STATES PATENT OFFICE IATTERN CONTROL AND SHEDDING MECH- ANISM FOR LOOMS Wellford, S. 0.

Application September 10, 1934, Serial No. 743,431

8 Claims.

This invention relates to a pattern control and shedding mechanism for looms and more especially to a pattern control mechanism comprising a pattern chain operating in conjunction with a pattern drum to operate the shedding mechanism. I-Ieretofore, in dobby looms it has been found necessary in weaving complicated designs in a fabric, to make up a long chain to conform to the design being woven. This chain, very often, had to be several hundred links long to obtain the large number of combinations of positions of the harnesses for forming the design in the cloth, consequently, a large amount of space was required to accommodate the chain.

It is therefore an object of this invention to provide a pattern control mechanism which comprises a pattern drum, a short pattern chain for controlling the operation of said drum and a multiplying chain for controlling the pattern chain.

It is another object of this invention to provide a shedding mechanism normally held upwardly by resilient means and pulled downwardly by cams in the pattern drum at predetermined in- Since harnesses are pivotally connected by a rigid member and the treadles are normally contacting the cams on the pattern drums, there is no danger of shed changing due to the stretch-' ing of the connecting links, such as cords and the like, after it has once been formed.

It is a further object of this invention to provide a pattern drum with removable cams placed therein whereby the cams may be placed at desired intervals to form the pattern. It is evident that any combination of the cams may be used, that is, a one pick cam, two pick cam, three pick cam and so on, and placed at various positions which will form a different combination. A one pick cam will maintain the shed during one pick of the loom, a two pick cam for two picks of the loom, and so on.

It is still a further object of this invention to provide a pick finding arrangement whereby the pick may be found when an end breaks down in the filling. Means are provided for rendering the other parts of the apparatus inoperable while the pick finding arrangement operates the shaft upon which the pattern drums are mounted.

It is still another object of this invention to provide a loom having a plurality of harnesses disposed at an angle to the vertical, with means for lowering the harnesses, with a pattern drum for operating the raising and lowering means, with means for advancing the pattern drum, step by step, with a pattern chain for controlling the means for advancing the pattern drum, with a multiplier chain for controlling the movements of the pattern chain, together with means for controlling the direction of movement of the pattern drum.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which:-

Figure 1 is a front elevation of the lower lefthand portion of a loom showing the invention applied thereto;

Figure 1A is a front elevation of the lower right-hand portion of the loom showing the invention applied thereto;

Figure 2 is a'sectional plan View of the parts shown in Figure 1 and taken directly below the pick shaft in the loom;

Figure 2A is a sectional plan view of the parts shown in Figure 1A and taken directly below the pick shaft in the loom;

Figure 3 is a rear elevation of the portion of the loom shown in Figure 1A and showing the harness mechanism;

Figure 3A is a rear elevation of portions of the loom shown in Figure l and also showing the harness in elevation and the driving means for the loom;

Figure 4 is a vertical sectional view taken along line 4-4 in Figure 3;

Figure 5 is a transverse sectional view taken along the line 5-5 in Figure 2A;

Figure 6 is a transverse sectional view taken along line 66 in Figure 2A; a

Figure 7 is a transverse sectional view taken along line B8 in Figure 2A;

Figure 8 is a transverse sectional view taken along line 8-8 in Figure 2A;

Figure 9 is a sectional view taken along line 9-9 in Figure 2A;

. Figure 10 is a sectional view taken along line l0lll in Figure 2A showing the means for resiliently holding the pattern chain in position;

Figure 11 is a transverse sectional view taken along line H--l| in Figure 2A and showing the details of the pattern drum;

Figure 12 is a sectional plan view of the levers which operate the harness and looking down upon the right-hand portion of Figure 1 and the upper left-hand portion of Figure 1A;

Figure 13 is a transverse sectional view taken along line l3-l3 in'Figure 2A;

Figure 14 is a vertical sectional view taken Figure 15 is a sectional plan view taken along line I5-I5 in Figure 14;

Figure 16 is a sectional plan view taken along line I6--I 6 in Figure 14;

Figure 17 is a sectional View taken along line I'I-I'I in Figure 2A;

Figure 18 is a sectional View taken along line I8I8 in Figure 3 showing the harness magazine;

Figure 19 is an enlarged detail view of an enlarged portion of the pattern chain showing means for constructing the same in a desired manner;

Figure. 20 is a longitudinal sectional view taken along line 20-20 in Figure 2A but showing the eccentrics rotated 90 degrees from the-position shown in Figures 2A and 5.

Referring more specifically tothe drawings, the numerals I0 and I I denote the end frames of a loom which are secured to each other at their 7 lower ends by suitable struts I3 and I4. Other struts I5'and I 6 are. secured to side walls II and I0 respectively. One end of strut I! is secured to strut I4 by any suitable means such as bolt i8, (see Fig. 2A) and'the other end of strut I! has a clip angle I9 secured to the end thereof by any suitable means such as bolt 20, said angle member I9, having its outstanding leg secured to strut I3 by any suitable means such as bolt 2!. A similar strut 29 has its ends secured in a. similar manner to strut I4 by any suitable means such as a bolt 30 and the other end of this member 29 has an angle member 3| secured thereto by any suitable means'such' as bolt 32, the outstanding leg of said angle member being secured to strut I3 by any suitable means "such as bolt 33.

Strut 34 is secured at one end to strut I 4 by any suitable means such as bolt 35, and the other end of this strut has an angle member 39 secured thereto by any suitable means such as bolt 31, said angle member 36 having its horizontal leg normally resting on top of strut I3 and being secured thereto by means of bolt 38. A similar member 39 has its end secured in alike manner to strut I4 by any suitable means such as stud bolt 40 and the other end of member 39 has an angle member 4I secured on the end thereof by any suitable means such as bolt 42.

The horizontal leg of angle member 4! normally rests on the top of strut I3 and is engaged thereto by any suitable means such as bolt 43. It should be noted that transverse struts I1, 29, 34 and 39 are similar and have their upper surfaces disposed at the same elevation. The structure described thus far comprises the framework upon Which the invention is mounted and which will presently be described.

Rotatably mounted in end frames I0 and II is a conventional crank shaft 5! (see Figs. 3 and 3A) upon which is fixedly'mounted on the end thereof a gear 52. Another gear 53 is also fixedly mounted on crank shaft 5I which meshes with gear 54 which is fixedly mounted on pick shaft 55, said shaft 55 being rotatably mounted in end frames l0 and II.

A suitable source of power, not shown, is adapted to drive gear 52 to cause the same to rotate and to operate the loom. Another pinion 56 is fixedly mounted on'pick shaft 55 (Fig. 3) which meshes with pinion 5'I fixedly secured on eccentric shaft 59. It should be noted that the apparatus is practically symmetrical about the center line with a few exceptions which will later be described, therefore, a. description of the parts on one side of the loom will be made and similar parts located on the other side of the loom W l be said bearings being secured to frames 64 and 64' by any suitable means such as bolts 62, 63, 62', and 63' respectively, and the shaft 59, at its ends, is ro-tatably mounted in bearings 68 and 58 which in turn are secured to the top of struts I5 and It by any suitable means such as bolts 89 and 69 respectively. Frame 64 rests on the top of struts I1 and 29 and is secured thereto by any suitable means such as bolt 65. The frame 94 has spacer members 98 and 61 which separate the portions resting upon transverse members I? and 29, so

that these portions may be parallel at all times.

Fixedly secured to shaft 59 are eccentrics I6 and Il. Eccentric I6 rotates in housing 18 (Figs.

2A and 5) which is comprised of a lower casing I9 and an upper casing said casings being secured to each other by any suitable means such as bolt 8|. The lower casing I9 has projec-, tions 82 and 83 extending therefrom which normally slide on top of frame 84. An identical eccentric TI is mounted in a similar housing 84 which is comprised of a lower portion 85 and an upper portion 86 which portions are secured to each other by any suitable means such as bolts 81. The lower portion 85 likewise, has the ex tensions 88 and 89 integral therewith which slide on top of the frame 64. These extensions are similar to extensions 82 and 83 and act as supports for the eccentric housing 84. The eccentric housings I8 and 84 are tied to each other by any suitable means such as bolts 90, 9|, 92, 93, and I29. It is seen that as shaft 59 rotates that the eccentrics I6 and I1 will oscillate the housings 18 and 84 back and forth in a horizontal manner and likewise oscillate the levers and parts attached thereto which will later be described.

A lever is mounted for oscillation on bolt 92 (Figs. 2A and 5), and the left-hand end of this lever has a hook portion 96 which is adapted to engage at certain times the notches in ratchet wheel 91. Ratchet wheel 91 is fixedly secured on shaft 98 which has one end rotatably mounted in bearing 99, and an intermediate portion mounted in bearings I00 and IOI all of which are secured to struts I5, I1, and 29 by any suitable means such as bolts I02, 003 and I04 respectively.

The other end of shaft 98 (Fig. 2) is rotatably mounted in bearing I06 which is secured to transverse strut I6 by any suitable meanssuch as bolts I01. The portion of shaft 98 intermediate the bearings IOI and I06 is rotatably mounted in a sleeve I08, said sleeve I08 being rotatably mounted in bearings I09 and H0. These bearings are secured to the top of members 34 and 39 by any suitable means such as bolts III an II 2 respectively. 1

Referring again to Figure 5 it is seen that the right-hand end of lever 95 has pivotally secured thereto as at I22 a downwardly extending link I2I, the lower end of said link being pivotally secured as at I23 to a horizontally disposed lever I24. Lever I24 is mounted for oscillation on bolt 93, the left-hand end of said lever I24 being pivotally secured as at I25 to another downwardly extending link I25. The lower end of link I26 is pivoted as at I21 to a lever I28 which, in turn, is mounted for oscillation on horizontally disposed bolt I29. The left-hand end of lever I28 has a pointed end I39 which is adapted to engage the teeth in ratchet wheel 91 at the same time the hooked portion 96 engages the top portion of the ratchet wheel.

"The right-hand end of lever I28 has a tension spring I3I secured on the end thereof which extends upwardly and is connected to the lower side of the right-hand portion of lever 95. The spring I-3I normally holds the levers and I28 in the position shown in Figure 5 since members I2I, I24 and I26 produce an equalizing effect and movement of one of the levers in one direction will cause the other lever to move the same amount in the opposite direction. It is further seen that the right-hand portion of lever 95 has a resilient member I32 secured on the end thereof which normally engages the pattern chain I33. 7

It will be noted that as pattern chain I33 revolves, that rollers I34 will move directly under the resilient member I32 and cause the hooked portion 96 of lever 95 and the pointed portion I36 of lever I28 to engage the ratchet wheel 91 and to advance the ratchet wheel a predetermined amount. In other words, upon movement to the left of eccentric housings 18 and 84, due to the rotation of eccentrics 16 and 11 on shaft 59, (Figs. 5 and 2A), the point I36 will engage a tooth in the lower side of wheel 91 and advance the ratchet wheel 91 one tooth in a clockwise manner, whereas, as the eccentric boxes 18 and 84 are moved to the right in Figure 5, upon further rotation of eccentric shaft 59, the hooked portion 96 will engage a tooth in the upper side of ratchet wheel 91 and advance ratchet wheel 91 another tooth in a clockwise manner.

It is thus seen that a roller I34 is disposed beneath the resilient member I32 that each time the eccentric shaft 59 makes a revolution that the ratchet wheel 91 will be rotated in a clockwise manner in Figure 5 to the extent of two teeth in the ratchet wheel.

The resilient member I32, in the present instance, is shown disposed upon a bar in the pattern chain and is not elevated enough or a sufiicient amount to cause the points 96 and I39 to engage the ratchet wheel 91. By referring to Figure 19, the construction of chain I33 is more clearly shown.

It will be noted by referring to Figure 1A, that pattern chain I33 has five vertical rows of rollers, namely, I34, I35, I36, I31 and I38, each row of rollers being adapted to contact the end of a lever arm. In Figure 19, the detail of the chain only shows rollers I35, I36, I31, and I38, the rollers I34 being omitted at the point where this particular detail is taken. These rollers are mounted on bolts I39 which connect the two side portions of the chain together, a suitable cotter key I 40 holds the bolts in place. Spacer tubes or washers I II, I42, I43, I44, and I45 are provided to space the rollers at the desired point; It is evident that when the cotter pins I49 are removed that the bolt I39 can also be moved from the chain and spacer tubes of different lengths placed therein to place the rollers at different positions. Of course the spacing of the rollers is determined by the pattern which is being woven upon the loom.

In Figure 6 another lever I5I is shown mounted for oscillation upon bolt 92, the left-hand end of said lever having a hooked portion I52 which is adapted to engage at certain times the teeth in the ratchet wheel 91. The left-hand portion of this lever has a tension spring I53 securedthera to as at I54 and this spring extends downwardly and has its lower end secured to bolt 90.

The right-hand end of lever I 5I has a bolt I55 pivotally secured thereto as at I56 and this bolt extends downwardly, penetrating the righthand end of lever I 51. A compression spring I58 is confined on the lower end of bolt I 55 by any suitable means such as nut I59. This spring normally pushes the right-hand end of lever I51 upwardly against nut I66. Lever I51 is mounted for oscillation on bolt 93 and has its left-hand end engaging a cam I6I which is fixedly secured on eccentric shaft 59. The right-hand end of lever I5I likewise has a resilient member I62 which contacts the line of rollers I36 on pattern chain I33.

In the position shown in Figure 6, the resilient member I62 is shown contacting a roller I36 and the hooked portion I52 is shown engaged in the ratchet wheel 91. The mechanism shown in Figure 6 is adapted to cooperate with the mechanism shown in Figure 7, to hold their respective ratchet wheels in a fixed position while the rocker motion of the pattern drum takes place; however, it might be stated here, that the spring I53 is weaker than the spring I58 so that the righthand end of lever I 5I will move downwardly when a roller I36 is not disposed beneath theresilient member I62. 1 The spring I53 only assists the resilient member I62 in holding the hooked portion I52 downwardly in engagement with the ratchet wheel 91 when a roller is disposed beneath the resilient member I62. The cam I 6| does not move the lever I5I in any mannerwhen a roller is present beneath the resilient member I62, since the right-hand end of lever I51 is resiliently held upwardly by means of compression spring I58. It is'only when a1 roller is not present beneath the resilient member I62, that the cam I6I causes the right-hand portion of lever I 5| to move downwardly thereby causing thehooked portion I52 on the left-hand end to be isengaged from the ratchet wheel 91 each time the eccentric shaft 59 makes a complete revolution.

When a roller I36 is not under the right-hand end of lever I5I, the cam I6I will operate the levers I51 and I 5I when the parts are at their extreme left-hand position as shown in Figure 6, to cause hooked portion I52 to be disengaged from the ratchet wheel when the travel to the right begins.

Figure 7 shows a structure very similar to that shown in Figure 6 and is adapted to be operated in the same manner and at the same time. A lever I65 is mounted for oscillation on bolt 92 and this lever has a pointed end I66 which is adapted to engage, at certain times, the ratchet wheel I61 which is fixedly mounted on shaft 98. It should be noted that ratchet wheel I61 has its teeth disposed in the opposite direction from the teethin ratchet wheel 91, so that when the hooked portion I52 engages the teeth in ratchet wheel 91 and the pointed portion I66 engages the teeth in ratchet wheel I61, the shaft 98 Will be oscillated. In other words, the hooked portion I52 will secure the shaft 98 from rotation in one direction and the pointed portion I66 secures the shaft 99 from rotating in the other direction and therefore, the shaft 98 will only oscillate the amount that the eccentric housings i8 and 84 move. This will produce a rocker motion which is effected only when a roller is disposed beneath the right-hand end of levers I 5| and I65.

The right-hand end of lever I65 of Figure '7 has a resilient member I 68 secured thereto which is adapted to contact the line of rollers I31 on pattern chain I33. It should be noted that the rollers I31 and I36 are disposed in pairs and there is a roller disposed beneath the resilient member I62 and also there is a roller disposed beneath the resilient member I68, thereby causing the levers I5I and I65 to operate simultaneously. V

A downwardly projecting bolt I69 is pivotally secured to the right-hand portion of lever I65 as at I and this bolt penetrates the right-hand end of another lever I1I which is similar in all respects to lever I51 previously described. A compression spring I12 is disposed beneath lever HI and around the bolt I69. This compression spring is confined on the bolt I69 by any suitable means such as nut I13. It is seen that the spring I12 normally forces the right-hand end of lever I1! up against nut I14 which nut is also secured on bolt I .69 directly above the right-hand portion of lever I1 I. The left-hand end of lever I1I contacts acam I15 which is fixedly secured on eccentric shaft 59. Tension spring I11 is secured as at I18 to the left-hand portion of lever I65 and the lower end of tension spring I11 is secured to pin 90 and is similar in all respects to spring I53 just described and serves the same purpose, that is, to assist the resilient member I68 in causing the pointed end I66 to engage the ratchet wheel I61 when a roller is disposed beneath the resilient member I68.

With a roller I31 disposed beneath the righthand end of'lever I65 as shown in Figure 7, the rotation of cam I15 will not aifect the lever I65 in any manner forwhen the high side of cam I15 is disposed beneath the lever I1I, the spring I12 will be compressed and thereby not affect the lever I65." When a roller is not present beneath the right-hand end of lever I65, the cam I15 will cause the right-hand end of lever I65 to move downwardly each revolution of eccentric shaft 59 since the tension spring I11 is weaker than the compression spring I12. The lever I65 is shown at the extreme left-hand po sition in Figure 7, therefore when there is no roller beneath the end of this lever, the end I66 will be in engagement with ratchet wheel I61, but since the lever I65 is traveling to the right the wheel 51 will not be affected. j

' When the shaft 59 rotates 180 degrees from the position shown in Figure '1 and there is still no roller beneath the right-hand end of lever I65 the high side of cam I15 will operate lever Ill and cause the left-hand end of lever I65 to be in raised position as the eccentric boxes which carry the lever I65, move again to the left in Figures 6 and '1, therefore the ratchet wheel I61 will not be operated by lever I65 when there is no roller present beneath the right-hand end of these levers; In other words, when there is no roller present beneath the resilient member I62 the high side of cam I6I will be disposed beneath the left-hand end of lever I51 as the lever I5I moves to the right in Figure 6, but when a roller is present beneath the resilient member, the action of cam I6I will not affoot the lever I5I, and the hooked end I52 will engage ratchet wheel 91 upon movement of the same to the right.

Likewise, when there is no roller beneath the resilient member I68, the high side of cam I15 will be disposed beneath the left-hand end of lever I1I as the lever I65 moves to the right in Figure 7, but when the roller is beneath the resilient member the action of cam I15 will not aiTect the lever I65 and the pointed end I66 will engage ratchet'wheel I61 upon movement to the left.

Figure 8 shows a structure very similar to that shown in Figure 5, but shows means for rotating the shaft 98 in a counterclockwise direction. A lever I86 is mounted for oscillation on bolt 92, and this lever has a pointed end I81 which is adapted to engage the ratchet wheel I61 at certain times. Lever I86 has a resilient member I88 on the right-hand end thereof which contacts a line of rollers I38 on pattern chain I33. Pivotally secured as at I89 is a downwardly extending link I99 which in turn, is secured as at I9! to horizontally disposed lever I92. Lever I92 is mounted for oscillation upon a bolt 93 and the left-hand end of this lever has secured there to as at I93 another downwardly extending link I94. The lower end of link I94 is pivotally se-' cured as at 95 to the right-hand portion of lever I96, mounted for oscillation on bolt I29. Secured to the right-hand end of lever I96 is a tension spring I91 which projects upwardly and has its upper end secured to the right-hand end of lever I86. This spring causes the levers I86 and I96 to move simultaneously, that is, when the left-hand portion of one lever'is out of en'- gagement with the ratchet wheel, the corre-' sponding portion of the other lever is also .out of engagement. This is made effective by the means of links I99, I92, and ISA-which act as equalizers for the two levers. The lever I96 has a hooked portion I91 on the left-hand end thereof which is adapted to engage the lower side of ratchet wheel I61 at certain times. Levers I96 and I96 are disposed at the extreme lefthand position in Figure 8. When a roller I38 moves beneath the right-hand end of lever I86, the portions I81 and I91 will engage the ratchet wheel I61. As these levers move to the right from the position shown-in Figure 8, the portion I91 will engage a ratchet tooth and rotate the ratchet wheel I61 one notch in a counter clockwise manner and as the levers I86 and I96 are moved again to the right on the completion of a revolution of eccentric shaft 59, the portion I81 will engage the ratchet tooth in the upper side of ratchet wheel I61 and rotate this wheel another notch in a counterclockwise manner. This action is exactly the reverse of the action which takes place in the mechanism shown in Figure 5 since the teeth in the ratchet wheels I61 and 91 are pitched in opposite directions. In other words, the mechanism shown in Figure 5 is constructed to cause a clockwise rotation of the,

shaft 98 whereas, the mechanism shown in Figure 8 is constructed to cause a counterclockwise rotation. When the parts shown in Figures 6 and '1 are in an operative position, there are rollers beneath the right-hand end of levers I5I and I65. This, as has been previously stated, produces a rocker motion and when this is taking place there will be no rollers disposed beneath the right-hand end of levers 95 and I86. The pattern chain is made in this manner in order to prevent engagement of the left-hand portion of the levers 95, I28, I86, and I96, while the rocker motion is taking place.

When the parts as shown in Figure 5, are in operation, due to the roller being disposed beneath the right-hand end of lever 95 the parts shown in Figures 6, '7, and 8 are in inoperative position and there are no rollersdisposed beneath the right-hand end of these levers. Likewise, when the parts shown in Figure 8 are in an operative position, and a rolleris disposed beneath the right-hand end of lever I86 the parts shown in Figures 5, 6 and 7 are in inoperative position and there are no rollers beneath the right-hand end of the levers 95, I5I, and H65.

The pattern chain I33 is mounted for rotation on a suitable sprocket I99 which is fixedly secured to shaft 200. Shaft 290 is rotatably mounted in bearings 20I, 292, and 293 which are; in turn, secured to struts I5, I1 and 29 by any suitable means such as bolts 294, 295 and 298 respectively. Fixedly secured on the left-hand end of shaft 299 is a wheel 20'! (Figs. 1A, 2A, and 10), which has cavities 298 in the left-hand face thereof. A roller 209 normally engages one of these cavities 293 and this roller is rotatably mounted in the right-hand end of a suitable plunger ZID, said plunger 2I0 having a restricted portion 2| I which is slidably mounted in the upper portion of bearing 203; The right-hand end of compression spring 2I2 normally abuts the enlarged portion of plunger 2 I I and the left-hand end of the spring abuts a suitable plug 2I2a which is secured in the end of the bore in which the plunger 2ID is mounted. Nut 2I3 is threadably secured on the end of restricted portion 2 which limits the movements to the right of the plunger 2I9 under the force of the spring 2I2. It is seen that the roller 299 which occupies one oi the cavities 208, will resiliently hold the shaft 299 and the sprocket I99 which is fixedly secured thereon, in position.

Since there is a cavity 298 in the face of the wheel 291 to correspond to every corrugation in the sprocket wheel I99, each time the sprocket wheel I99 is advanced to cause another roller or transverse rod in the chain I33 to be disposed beneath one of the resilient members, the roller 299 will hold the sprocket in a fixed position until it is advanced another notch. At the time of the advancement of the sprocket I99, the roller 299 will move to the next cavity 208 and the spring 2I2 will be compressed to allow the plunger to be moved to the left. It is therefore seen that means have been provided for resiliently holding the sprocket I99 in position, after the sprocket i I99 has been advanced a predetermined amount.

A lever 2I4 is pivotally mounted as at 2I5 in bearing 262 and the member I I by any suitable means such as bolts 205 and 2II. The left-hand end of lever 2I4 as viewed in Figures 1A and 2A and 9, has a member 2 I 8 pivoted on the end thereof as at 2 I 9; Disposed directly above member 2| 8 is a portion 229 which is integral with lever 2! and a compression spring 22I normally abutsthe lower side of this portion and the upper side of member 2 I8. By having the member 2 I 8 mounted on the end of lever 2'I4 in this manner, the lever is caused to resiliently engage the rollers I35 or the transverse sleeves on the pattern chain I33 at all times. The right-hand end of lever 2I4 contacts the multiplier chain 229 which is mounted on sprocket 239. The pattern chain 229 is similar in construction to pattern chain I 33 which is shown in detail in Figure 1-9 and a detailed description is not deemed necessary, however, it

might be stated that the chain may be'dismantled and'rollers spaced at desired intervals to conform to the pattern which is being Woven upon the loom.

The multiplier chain 229 is adapted to hav rollers 23! spaced at desired intervals to operate the lever 2I4. The sprocket 239 is rotatably mounted upon shaft 29.9 and has integral therewith a ratchet wheell232 (see Fig, 4). Sprocket wheel 23:) and a ratchet whee1 232 have intetn therewith another wheel 228 which has corrugations 298 in the face thereof and which are adepted to be "engaged by a rbller'299 meiinte eh plunger 259. This structure is identical to the structure just described and shown in Figure 10 and serves to resiliently hold the ratchet wheel 292 and sprocket 239, in a fixed position when the ratchet w eei zsz is not being operated by the parts which will presently be described.

A lever 235 has its right-,hand end (see Fig. 4) resting upon the ratchet 232 at an times and the left-hand end of lever 235 is pivotallyseciired as at 235 to'the upper end of lever 23'! which extends downwardly and is pivoted as at 238 to a bracket 239, said bracket being secured to the side frame II by any suitable means such as rivets 240. A tension spring 24 I has one end thereof secured to the lever 231 as at 242 and its other end secured tolever 235 as at 243. This causes the right-hand end of lever 235', to resiliently rest against the ratchet wheel 232 at all times.

An elongated (29.111244 is fixedly secured on eccentric shaft 59 and is heldin contact with the arm 237 since the lower end of lever 23'! has an extension to which s secured one end of tension spring 245. Theoth'er end of spring 245 is secured to a pm 246, which, in turn, is-secured to the sidewall II. p l

It is evident that when eem zn makes a complete revolution that lever 235 will be moved to the right two times This causes the ratchet wheel 232 to be a vanced twonotches which n turn causestwo pins in niultiplying chain 229 to pass beneath the right-handend of lever 2M.

eyirererrihg to Figures IA, 2A, and 13 it will be seen that another ratchet wheel 253 is pro,- vided which is fixedly mounted on shaft 2901 This ratchet wheel is very similar to ratchet wheel 232 whic has just been described, and when this ratche wheel is operated, it advances the pattern chain [33 and the shaft 2m: a predetermined amount; The right-hand end of a lever 25 i (see Fig. 13) is adapted to en gag'e the notches in ra'tehet wheel 2'53 when the left-hand portion of lever" 214 viewed in Figure 1A, is iii lowered position. ,7 Of course in order for the lefthand' portion of lever 214 to be in a loweredposie tior'i it will be necessary for a roller 231 on multiplier' chain 229' to be disposed beneath the righthandend of lever 2m Lever 254 15 pivotally se-' cured as at 25 to the upper portion of lever 256, which extends downwardly and is pivoted as at 25'! to frame 64. Lever 256 has a'projecition on the lower end thereof to which one end of a tension spring 258- is secured and the other end of said spring is secured as at' 259 to strut #1. This spring 258 normally holds the upper end" of lever 259 in contact with a cam' 2G9 which is similar in all respects to cam 244' which has been previously described, but it will be noted that his disposedat 90 degrees'o'n shaft 5 9from the position of cam 2'44;

Tension spring 26f has one'end'the'reof secured to lever 256 as at ZSZ andj its other end secured" to: lever 254 as at 263. -'Ihis'causes lever25l to" The position of lever 214 determines whether or not the lever 254 is engaging ratchet 253.

When a roller 231 is moved beneath the righthand end of lever 214 (Fig. 1A), the left-hand end moves downwardly and allows lever 254 to engage ratchet wheel 253 one notch. Since the cams 244 and 268 (see Figs. 4 and 13), are disposed at right angles to each other, it is seen that rollers 231; will be moved beneath the end of lever 214 when the high side of cam 244 engages lever 231. Then the'high side of cam 268 engages lever 256 and causes the ratchet wheel 253 andchain 133 to be advanced one notch. While the ratchet wheel 253 is being advanced the lever 235 is returning to the position shown in Figure 4, and upon further rotation of shaft 59, the other high side of cam 244 will engage lever 231 to cause the ratchet wheel 232 and the multiplier chain 229 to be advanced another notch which will move the roller 231 from beneath the end of lever 214, thereby disengaging the lever 254 7 from engagement with ratchet wheel 253. When a roller 135 is not disposed beneath the left-hand end of lever 214 (Fig. 1A), this end of the lever will move downwardly, due to the downward force exerted on the lever by m-eans of lever 254 and spring 261. The lever 254 will then engage ratchet wheel 253 and rotate the chain 133 untila roller again moves beneath the left-hand end of lever 214.

Fixedly secured on shaft 98 is a pattern drum 265 which has suitable grooves in the periphery thereof in which suitable cams are removably mounted by means of bolts 266. It is seen that there are five peripheral grooves in the pattern drum 265 and that in each groove a plurality of cams are mounted such as 261, 1268, 269, 218, and 211, (Fig. 11). It is evident that these cams may vary in their positions, shape and length to conform to the pattern to be woven upon the loom. The cam 26'! will hold a treadle and harness down during one pick of the loom, cam 268 for two picks, cam 269 for three picks and cam 218 for four picks. Cam 211 is provided to allow a treadle and harness to remain in an elevated position and these cams may be disposed at desired points and made of variable lengths to conform to the pattern being woven. The rows of cams disposed in the pattern drums 265 will be noted by the reference characters 212, 213, 214, 215, 216, and 211. These cams are adapted to operate treadles 2'18, 219, 280, 281, 282, and

283 respectively. Each of the treadles has a roller 284 mounted in the upper side thereof (Fig. 11) which contacts the rows of cams 212 to 211 inclusive. One end of the treadles 218 to 283 inclusive is pivotally mounted on a bolt 285, said bolt 285 having its ends mounted in suitable bearings 286 and 281 which in turn are secured to longitudinal struts 14 by. any suitable means such as bolts 288 and 289 respectively. The ends of the treadles 218 to 283 inclusive, nearest the observer in Figure 2A, are pivoted to the lower ends of vertically disposed links 388, 381, 382, 383, 384, and 385 respectively.

All of these links are identical to link 388 shown in Figure 11, and are connected up in the same manner. Links 388 to 385, inclusive, extend upwardly and have their upper ends secured to the central portion of lever arms 386, 381, 388, 389, 318, and 311, Figure 12, said arms being pivotally secured on bolt 31211 which is mounted in bearings 313 and 314, said bearings 313 and 314 being secured tobearings 283 and 283 by any suitable means such as bolts 285 and 285. Levers 386 to 311 inclusive have pivotally secured on the ends thereof vertically disposed links 312, 313, 314, 315, 316, and 311 respectively, said links being similar in construction. One of the links is shown in detail in Figures 3, 3A, and 11, and it is not deemed neces- Sary that the remaining links be shown in detail. Link 3E2 has its upper end secured in the jack stick of harness 318 by any suitable means such as having a nut 319mounted on the upper end of link 312 and engaging the lower side of the 'jack stick and another nut 328 engaging the upper side of the jack stick thereby causing the jack stick to be fixed to the link. A brace 321 has one end penetrating the link 312 and is secured thereto by any suitable means such as nuts 323 and 324, which are disposed on opposite sides of member 312. The other end of brace 321 is secured to the jack stick of harness 318 by any suitable means such as nuts 325 and 326 which are disposed on opposite sides of the jack stick. Each of the connections, from the arms 383 to 311 inclusive to the harness frames, are similar to the connections 312 and its associated parts which have just been described.

. The links 312 to 311 inclusive are connected to the jack sticks of harness 3), 333, and 331 inclusive, respectively, in a similar manner to that shown in Figures 3 and 3A. These harnesses are mounted for vertical movement in magazines 338 and 339 and are normally pulled upwardly by means of springs 348 and 341, said springs 348 and 341 having their lower ends connected to the jack stick of each of the harnesses and their upper ends connected toangle members 342' and 343 which are secured on the backs of magazines 338 and 339 respectively.

By referring to Figures 3 and 18 it is seen that magazine 338 hasan adjustable angle 3441 secured thereto by any suitable means such as bolts 345 and 346 which penetrate slots 341 and 348 respectively. Magazine 339 has a similar angle 349 secured to the side thereof by any suitable means such as bolts 358 and 351 which penetrate suitable slots in magazine 339, not shown, but which are identical in all respects to the slots 341 and 348, shown in Figure 18. By providing angles of this type on the magazine, it is evidentthat harnesses'may be removed from the magazine and the angle members 344 and 349 moved inwardly to cause the remaining harnesses to fit properly within the magazines. Magazine 339 is mounted on shaft 359 which shaft is adjustably mounted in a bearing 368 by any suitable means such as set screw'361. 'By manipulating set screw 361 the angularity of the magazine 339 may be adjusted. Magazine 338 is mounted on a similar shaft 362 which, in turn, is adjustably mounted in a bracket 363 by means of a set screw 334. The angularity of this magazine 338 may likewise be determined by manipulating the set screw 364 (Fig. 3).

The left-hand end of shaft 362 penetrates a lever 365 and has pins 366 and 36'! disposed on opposed sides of said lever. Lever 365 is pivoted as at 368 to a bracket 369 which, in turn, is secured to side frame 11. When it is desired .to remove a magazine from the loom, set screw 364 is loosened and lever 365 is operated to pull the magazine 338 far enough to the left to remove a harness frame from the magazine. One end of treadles 318 to 315 inclusive, are pivotally mounted on bolt 285 and the lower end of these treadles are operated by rows of cams 316 to 381 inclu- 1 sive, respectively, in pattern drum 382. This pattern drum is practically identical to pattern drum 265 which has been previously described, except that it is fixedly mounted upon sleeve E98 instead of being mounted on shaft 98. Each of the treadles 319 to 315 inclusive has a roller 284 as shown in Figure 11 on the upper edge thereof which contacts the rows of cams 315 to 385 inclusive. Treadles 319 to 375 inclusive also have vertically disposed links 384 to 339 inclusive which project upwardly and have their upper ends secured on the central portion of lever arms 39!) to 395 inclusive, respectively. Links 384 to 389 inclusive are identical to the links 399 as shown in Figure 11, and a further showing of these levers is not deemed necessary. Lever arms 399 to 395 inclusive have pivotally secured on the end thereof links 396 to 49! inclusive respectively, which are similar in structure to link 1H2 as shown in Figures 11-, 3 and 3A. The upper end of these links 396 to 48! inclusive, are secured to the jack stick of harnesses 492, 463, 464, 405, 406, and 49? respectively. The means for making this connection are identical to that shown in Figures 3 and 3A.

Bracket 416 is secured to the upper portion of strut 14 (Fig. 4) by any suitable means such as bolt 4". This bracket has pivotally mounted therein, as at MS, a lever 419 which extends to the right as shown in Figure 4, and contacts a cam 426 which is fixedly secured on pick shaft 55. The right-hand end of lever 419 has secured thereto, as at 42L a connecting link 422 which projects upwardly and is secured to a selvedge harness 423. Secured to the upper portion of selvedge harness 423 is a cable 424 which is mounted on roller 425 which is rotatably mounted in the upper portion of magazine 338, as at 426. The other end of cable 424 is secured to the upper portion of a second selvedge harness 42'! and the lower edge of this harness has secured thereto a cable 428 which extends downwardly and is connected to the upper end of a suitable tension spring 429, said tension spring having its lower end secured to bracket 43!) which, in turn, is secured to end wall II by any suitable means such as bolts or rivets 43!. The means for operating the other side of selvedge harness is identical in all respects as is shown in Figures 4 and 2A, and a detailed description will-not be made, but like reference characters will be given like parts with the prime notation added.

In ordinary weaving, when end breaks, it is impossible to stop the loom exactly at that time but the harnesses oscillate several times before the machine comes to a final stop. When this is done the pick of the shuttle thread is lost and the machine must be reversed or backed up a small amount in order that the pick may be found. The mechanism for performing this operation in this invention will be presently described.

One end of a longitudinal shaft 44l, (Figs. 2 and 2A and 5 to 8 inclusive) is rotatably mounted in bearing 442, this bearing 442 being secured to the side frame H by any suitable means such as bolts 443. Other portions of this shaft 44! are also rotatably mounted in bearings 444 and 445 which are, in turn, secured to the upper portion of frame 64 by any suitable means such as stud-bolts 446 and 441 respectively. The other end of this shaft is mounted in a similar manner in bearings 442, 444, and 445', which are identical to the bearings just described, and are secured tov end frame It), and frame 64-. Mounted.

on the ends of shaft 44! are hand wheels 448 and 448' which are used to rotate the shaft when it is desired to operate the cams 449 and 449' which are fixedly secured on shaft 4'4I. It is seen by referring to Figures 5, 6, '7, and 8, that when the hand wheels 448 and 448' are rotated and the high side of the cam 449 engages the lower left-hand end of levers 95, l5l, I55, and I86, that the end of all of the levers will be disengaged from the ratchet wheels 91 and I67. This will leave the shaft 98 free to be rotated by the means described as follows: A ratchet wheel 45!) (Figs. 4 and 2A), is fixedly secured on shaft 98 and comprises a double ratchet wheel with teeth pitched in opposite directions. These ratchet wheels are denoted by the reference characters 45! and 452 (Figs. 4 and 14). A pointed lever 453 is adapted to engage teeth in ratchet 45| and this lever extends to the right in Figure 4, and is pivotally secured as at 454 to a vertically disposed lever 455 which is rotatably mounted on shaft 59. Another hooked lever 456 (Fig. 14) is adapted to engage the ratchet 452 and this lever likewise extends to the right and is secured as at 454 to lever 455.

Lever 455 extends upwardly and rests in an indentation in the slot 455 which'is formed in the outstanding leg 45? of bearing 353. The lever is shown in Figures 14 and 15, in inoperative position, and in this position, neither of the levers 453 nor 456 engage a ratchet. Lever 455 has pivoted to the side thereof as at 458, a bell crank 459, the vertical legs of bell crank 459 normally resting in a cavity in bracket 460. Bracket 499' is secured to the side of lever 455 and it is seen that this bracket has three cavities in the side thereof in which the vertical leg of bell crank 459 may rest. For example, if the vertical legv of bell crank 459 should rest in indentation 4 6lthe horizontal leg of the bell crank would be raised, whereas, the reverse would be true should the vertical leg rest in indentation 462. The horizontal leg of bell crank 459 (Fig. 14) has a vertical rod 463 penetrating the end thereof and a spring 464 is disposed around rod 463 above the horizontal leg which is confined thereon by any suitable means such as a nut 465. A similar spring 461 is held in contact with the lower portion of the horizontal leg by means of a nut 468. The lower end of link 483 (Fig. 17), is pivoted as at 416 to' ahorizontally disposed bar 411, said bar 4' being pivotally mounted as at 412 on projection 413 which is integral with lever 455. Since the ends of bar 4' penetrate the levers 453 and 456, it is evident that when the vertical leg of bell crank 459 is moved to notch 43l that the link 463 will be raised thereby raising the left-hand end of member 411 (Fig. 17) to cause the hooked member 456 to be raised upwardly and the pointed member 453 to be lowered to engage the ratchet This will allow the operator to operate the ratchet 45! and to cause the shaft 98 to be rotated in a counterclockwise manner in Figure'4'. If it is desired to rotate the shaft in a clockwise manner, the vertical leg of bell crank 459 will be moved to indentation 462 thereby lowering the link 463 and causing the hooked member 456 to engage the ratchet member 452. while the pointed member 4531s in elevated position. It'is evident that when thelever 455 is operated with member 456, in lowered position, that the shaft 93 may be rotated in a clockwise manner (Fig. 14). It is therefore seen that means have been provided whereby the: other portions of the machine may be rendered inoperative while the shaft 98 is turned in either direction to find the pick of the loom.

The operation of the invention Crankshaft 5I is constantly rotated which rotates the pick shaft 55 through pinions 53 and 54. The pick shaft, in turn, rotates the eccentric 59 through the pinions 56 and 51, and it is seen that the eccentric shaft 59 also rotates constantly thereby oscillating the eccentric boxes 18 and 84. The levers 95, I5I, I65, and I86 which are pivotally mounted on bolt 92 which is connected to the eccentric boxes 18 and 84, have the end nearest the observer in Figure 2A, normally contacting pattern chain I33. The method in which the pattern chain I33 operates the levers 95, I5I, I65, and I86 has been fully described in the foregoing specification and a repetition here is not deemed necessary.

Since the pattern chain I33 is mounted on the sprocket I99 and this sprocket is fixedly mounted on shaft 200, the shaft 200 will have to be rotated in order to rotate the pattern chain I33. The ratchet wheel 253 is also fixedly secured on shaft 200 and is operated by lever 254 which lever is connected to another lever 256. Since this lever contacts cam 269 it is seen that lever 254 oscillates back and forth two times, each time the eccentric shaft 59 makes a complete revolution. If the end of lever 254 is in lowered position the ratchet wheel 253 and pattern chain I33 will be advanced one notch, if it is not down due to the fact that the left-hand end of lever 2I4 is held upwardly by a roller I35, (Figs. 1A and 2A), the lever will oscillate but will not engage the ratchet wheel 253, therefore, the pattern chain I33 will remain stationary until the left-hand end of lever 2I4 in Figure 2A is caused to move downwardly by means of a roller 23I on the multiplying chain The multiplying chain 229 controls the pattern chain I 33 and each time a roller 23I moves beneath the right-hand end of lever 2I4 the lever 254 is caused to engage the ratchet wheel 253 and to advance the pattern chain I33 one notch. The left-hand ends of levers 95, II, I65, and I86 as seen in Figures 5 to 8 inclusive, normally operate the ratchets 91 and I61, the ratchet 91 being adapted to be rotated in a clockwisemanner and ratchet I61 being adapted to rotate in a counterclockwise manner. The manner in which the ratchets are operated depends entirely upon whether a roller is disposed beneath the other end of the levers 95, I5I, I65, or I86.

The levers 95 and I28 control the clockwise motion of the shaft 98, the levers I86 and I96 control the counterclockwise rotation of shaft 98, and the levers I5I and I65 control the rocker motion of the shaft 98.

It is evident that when shaft 98 is caused to rotate or to oscillate that the pattern drum 265 will move likewise since it is fixedly secured on the shaft. The parts shown in Figure 2 are identical to the parts shown in Figure 2A which control the pattern mechanism except that the pattern drum 382 and the ratchet wheels 91' 'and I61 are mounted on a sleeve I88 which will allow the pattern drum 382 to move independently of the pattern drum 265.

With the parts in the positions shown in Figures 6 and 7, it has'alr-eady been described that an oscillatory motion will be imparted to shaft 98 or sleeve I88, or both, depending upon the pattern desired. Therefore, if a one pick cam 261, (Fig. 11), is engaging the roller 284, then roller 284 will ride back and forth from the low portion of the cam 261 to the high point and thus cause shedding for ordinary weaving until a pattern change takes place for other types of weaving and oscillation of shaft 98 or sleeve I08, or both, is stopped, and rotation of shaft 98 or sleeve I98, or both, is effected.

It is therefore seen that nine combinations of rotations may be obtained in pattern drums 382 and 265. namely, (1) clockwise motion of both pattern drums 265 and 382; (2) counterclockwise motion of both drums 265 and 382} (3) clockwise motion of drum 265 and counterclockwise motion of drum 382; (4) counterclockwise motion of drum 382; (5) clockwise motion for drum 265 and rocker motion for drum 382; (6) counterclockwise motion for drum 265. and rocker motion for drum 382; (7) clockwise motion for drum 382 and rocker motion for drum 265; (8) counterclockwise motion for drum 382 and rocker motion for drum 265; (9) rocker motion for both drums 265 and 382.

In the present instance there are twelve rows of cams mounted in the pattern drums 265 and 382, namely, 316 to 38I and 212 to 211 which operate their respective harnesses. By referring to Figure 11 the construction of the pattern drum can be seen, and it will be noticed that the various cams may be placed at any desired position. With the cams -261 to 21I inclusive, disposed at different positions in the different rows, together with the various combinations of rotations of the pattern drums, it is evident that almost any number of combinations'may be produced in the shed of the loom. This arrangement eliminates a long pattern chain which is very often several hundred links long, that has heretofore been used and has occupied a great amount of floor space. A pattern drum is substituted therefor which is compact and which is operated by a very short chain. Since the harnesses are connected to the treadles by rigid means, it is seen that the sheds will be absolutely accurate and will not vary after they have once been set up, due to cords, connectors and the like, which will vary in length from day to day, on account of temperature, humidity and wear.

In the drawings and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

We claim:

1. In a loom having a plurality of harnesses, means for selectively positioning said harnesses to form sheds comprising a pattern drum for controlling the positioning of said harnesses, means for advancing said pattern drum, means for reversing said pattern drum and means for oscillating said pattern drum.

2. In a loom having a plurality'of harnesses through which the warp is passed, means for selectively positioning said harnesses to form sheds in the warp, a pattern drum for controlling the positioning of said harnesses, means for advancing said pattern drum, means for reversing the direction of travel of said pattern drum, and means for oscillating said pattern drum.

3. In a loom having a plurality of harnesses through which the warp is passed, means for selectively positioning said harnesses to form sheds in the warp, a pattern drum controlling the positioning of said harnesses, means for advancing said pattern drum, means for reversing the direction of travel of said pattern drum, means for oscillating said pattern drum, and a pattern chain controlling the means for advancing, the means for reversing and the means for oscillating said pattern drum.

4. In a loom having a plurality of harnesses through which the warp is passed, means for selectively positioning said harnesses to form sheds in the warp, a pattern drum controlling the positioning of said harnesses, means for advancing said pattern drum, means for reversing the direction of travel of said pattern drum, means for oscillating said pattern drum, and a pattern chain controlling the means for advancing, the means for reversing, means for oscillating said pattern means and a third pattern means for controlling the second pattern means.

5. In a loom having a plurality of harnesses through which the warp is passed, means for selectively positioning said harnesses to form sheds in the warp comprising a rotary pattern drum, means for advancing said pattern drum, means for oscillating said pattern drum, means for reversing said pattern drum and a pattern chain controlling both means for advancing and reversing the pattern drum.

6. In a loom having a plurality of harnesses through which the warp is passed, means for selectively positioning the harnesses to form sheds in the warp comprising a pattern drum, means for advancing said pattern drum, means for reversing said pattern drum, means for oscillating said pattern drum, and pattern chain controlling the means for advancing, reversing and oscillating the said pattern drum;

7. In a m having a plurality of harnesses through which the warp is passed, means for selectively positioning said harnesses to form sheds in the warp comprising a pattern drum, a plurality of pawls mounted for reciprocatory movement in the loom for imparting rotation to the pattern drum, means for imparting reciprocatory motion to said pawls and a pattern chain for controlling engagement of said pawls with the means for imparting rotation to the pattern drum.

8. In a loom having a plurality of harnesses, means for selectively positioning said harnesses to form sheds and comprising a pattern drum for controlling the positioning of said harnesses, a pattern chain for controlling the pattern drum, and means for oscillating said pattern drum.

EUGENE P. FLOYD. ARTHUR G. HACKNEY. 

